催化铁内电解CAST工艺耦合处理城市污水脱氮除磷效果研究

305201110SICHUANENVIRONMENTVol.30No.5October2011··2011-03-17FZ2008038。1981－2005。、。+CAST1211121.2120012.200092+CAST。。NH3-N96.40%TN36.55%TP90.00%A。CASTX703.1A1001-3644201105-0008-04StudyonDenitrificationandDephosphorizationinMunicipalSewageTreatmentAdoptingCoupledProcessofCatalyzedIronInternalElectrolysis+CASTZHOUPeng-fei12CHENBin1XULi-qun1YUYi-ping1MALu-ming21.ZhenjiangCityWaterIndustryCo．ZhenjiangJiangsu212001China2.CollegeofEnvironmentalScience＆EngineeringTongjiUniversityShanghai200092ChinaAbstractApilotstudyofcoupledprocessofcatalyzedironinternalelectrolysis+CASTfordenitrificationanddephosphorizationtotreatmunicipalsewagewasconducted．Theresultsshowedthattheprocessimprovedthecharacteroftheactivatedsludgeandtheperformanceofdenitrification．Besidesthesynergyofbiologicalandchemicreactionimprovedtheeffectofdephosphorization．DuringthetestallofthewaterqualityindexesweregoodactuallytheaverageremovalratesofNH3-NTNandTPwere96.40%36.55%and90.00%respectivelyallreachingthelevelAofthedischargestandard．KeywordsThecatalyzedironinternalelectrolysisCASTprocesscouplingsystemmunicipalsewagedenitrification＆dephosphorization。CAST。CAST。+CAST。11.11。1Fig.1ProcessflowdiagramCAST0.36m3CAST5m31.75m3。CAST、。。1.215℃～28℃CODCr100～250mg/LBOD540～100mg/LNH3-N15～28mg/LTN18～30mg/LTP1.5～4.0mg/LpH7.0～8.2。1.3。6mm1mm50cm10cm。、。、、0.5m。20.25m3。1.44/、、、/1。MLSS2500～4000mg/LDO0～1.0mg/LDO1.5～3.5mg/L12～20。1.5CAST。、CODCr、BOD5、NH3-N、NO－3-N、TN、TP、pH。。220。2.1CODCrBOD5CODCr、BOD52。CODCr15～45mg/L28.27mg/L83.83%。BOD52～10mg/L6.81mg/L90.28%。2CODCr、BOD5Fig.2WeeklyvariationofCODCr、BOD5removal2CASTCODCrBOD5A。2.2SSSS4～15mg/L10.28mg/L92.03%。SSBA。SSSS3。、、SS。3SSFig.3WeeklyvariationofSSremovalandsludgeloading38～13SSA。2.3NH3-NTNNH3-N18.32mg/LTN23.20mg/L。NH3-N0.1～1.5mg/L0.66mg/LTN8～20mg/L14.72mg/L。NH3-N、TN4。95+CAST4NH3-N、TNFig.4WeeklyvariationofNH3-NandTNremovalNH3-N1.5mg/L96.40%98.99%92.75%。TN36.54%53.44%2.25%。417、18TN2.25%、4.44%。NO－3-N19.05、19.02mg/L。15～18。。TN。5。5、Fig.5Weeklyvariationofdenitrificationwithcarbonsourceandsludgeloading515～20COD/TN10BOD5/TN2.5。15－20TN。19TN30%。。NH3-NNO－3-N12.35mg/LTN83.39%。。1215℃NH3-NTN。。10kg。160mg/L0.23mg/L。2.4TPTP2.50mg/LTP0.05～0.4mg/L0.25mg/L。TPA6。TP90.00%94.38%82.10%。6TPTNFig.6WeeklyvariationofTPandTNremoval6TP121。Fe2++PO3－4→Fe3PO42↓10130Fe+3+PO3－4→FePO4↓26TPTNTNTP。16TP、TNNO－3-N16～20TPTP。TP。2.5pH+CAST27。712344#CASTFig.7Microscopicexaminationofsludge12oftheupperarefrompilotand34ofthelowerarefrom4#CASTFe3+。。、、、。4#CAST。、pH4#CASTpH8。、pH。PH。34。Fe－2e→Fe2+E0Fe2+/Fe=－0.45V38、pHFig.8WeeklyvariationofinfluentandeffluentpH、O2+2H2O+4e→4OH－E0O2/H2O=0.40V4OH－Fe3+Fe2OH24+、Fe3OH45+、Fe5OH96+3pH。pH。pH0.304#CASTpH0.40。33.1CASTA。3.2NH3-N96.40%TN36.55%。TP90.00%。3.3OH－Fe3+Fe2OH24+、Fe3OH45+、Fe5OH96+pHpH。1．A/O/AJ．201026115-8.2.SBRJ.200727764-67.3.M.2008.310-312.115+CAST